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6. Education #for Obama # for Romney # for Others # of Voters No High School 19 20 1 40 H.S. graduate 114 103 3
6. Education #for Obama # for Romney # for Others # of Voters No High School 19 20 1 40 H.S. graduate 114 103 3 220 Some College 172 147 1 320 College 135 119 260 Graduate Post Graduate 70 88 2 160 TOTAL 510 477 13 1000 There were 1,000 voters in 25 precincts across New York City during the 2012 presidential election. If one person is to be selected at random from the sample of 1,000 voters, use the above table to answer each of the following questions: a) Given that the voter selected was a high school graduate, what is the probability that the person voted for Romney? P(Romney / HS graduate) b) Given that the voter selected had some college education, what is the probability the person voted for Obama? P(Obama/ some college) 7. Seventy percent of students in NYC are in favor of taking public transportation to school. Find the probability that in a random sample of 12 students: a) At least 9 will be in favor of taking public transportation to school. b) 6 or 7 students are in favor of taking public transportation to school. 3. How many five-digit zip codes can be made where all digits are unique? The possible digits are the numbers 0 through 9. 9. In how many ways can we select 5 books from a set of 10 books if order is not important
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